policer on Dual stack interface

I have customer having IPv4 access and policer of 10M configured through firewall filter on unit 10 ( i.e. vlan 10) on family inet.

Now Customer will have IPv6 also on same interface i.e. Dual stack and want to ensure that total traffic on his link not more than 10M ( i.e. includes IPv4 and IPv6). Can I apply same policer on family inet6 ? if so, will it be 10 for IPv4 and IPv6 individual i.e. 20M total or can be 10M combined. if not, How do i achive 20M total ?

Question : How do i add filter of 5M on unit 602 such way that both IPv4 + IPv6 traffic taken care through 5M policing and all traffic gets classifed in forwarding-class internet-Default. Is there a way to use existing Filter itself for both family ?